1#!/usr/bin/env bash
2# SPDX-License-Identifier: LGPL-2.1-or-later
3set -eu
4set -o pipefail
5
6cpp="$1"
7filesystems_gperf="$2"
8shift 2
9
10includes=""
11for i in "$@"; do
12    includes="$includes -include $i"
13done
14
15error=false
16
17# shellcheck disable=SC2086
18for fs in $($cpp -dM $includes - </dev/null | \
19            grep -E '_MAGIC' | \
20            grep -vE 'LINUX_MAGIC' | \
21            awk '/^#define[ \t]+[A-Z0-9_]+MAGIC[ \t]+/ { print $2; }'); do
22    if ! grep -E "\{.*$fs.*\}" "$filesystems_gperf" >/dev/null; then
23        # STACK_END_MAGIC doesn't refer to a filesystem
24        # mtd_inode was removed in 2015
25        # futexfs was removed in 2018
26        if [[ "$fs" =~ ^(STACK_END_MAGIC|MTD_INODE_FS_MAGIC|FUTEXFS_SUPER_MAGIC)$ ]]; then
27            continue
28        fi
29        echo "Filesystem found in kernel header but not in $(basename "$filesystems_gperf"): $fs";
30        error=true
31    fi
32done
33
34if $error; then
35    exit 1
36fi
37